Deep well pump



A. WILL DEEP WELL PUMP Sept. 26, 1939.

2 Sheets-Shea?I l Filed Aug. l2. 1955 in@ w .w www 4/ VENTOR ma TTORNEY' Patented sept. 26, 1939 UNITED sTATEs DEEP WELL PUMP August Will, Pasadena, Application August 12, 1935, Serial No. 35,753

4 Claims.

This invention relates to a pump and particularly pertains to a deep well pump.

In pumping liquid from vwells it is common practice to employ pumping equipment which requires the use of tubing lowered into the well to the level from which uid is to be elevated, and the additional useof pump rods which reciprocate within the tubing and actuate pumpingmechanism at desired levels within the well.

This type of equipment also makes it necessary4 to use lcomplicated and expensive-pump mechanism, which is necessary due to the fact that an unbalanced load condition exists in a reciprocating deep well pump mechanism since a heavy column of liquid must bellfted on the upstroke oi the mechanism and on the down stroke -there are no load requirements. Elaborate counterbalanced structures are thus required. In addition to the disadvantages in using a reciprocating pump mechanism in a deep .well as above enumerated, there is the disadvantage which results from crooked holes Within which thetubing may `;be bent and through which the pump rods may reciprocate with diiiiculty due to the binding action and the wearthat might occur between .the pump rods and the tubing.

It is the principle object of the present invention, therefore, to provide a pump structure within which al1 of the pumping actuating apparatus is above ground and an additional valve and pump unit is within the well and which apparatus acts within the well by fluid pressure to elevate .the liquid of the well, the structure acting to pro- Nide a balanced load on both strokes o f the pump, thereby eliminating the use of sucker rods, the necessity for an elaborate counterbalancing mechanism, and making it possible to pump the @liquid by mechanical action taking place entirely outside of thewell bore.

The present invention contemplates the provision of a reciprocating power pump mechanism disposed above ground and which mechanism is attached to a pair of strings of tubing extending into the level of a desired depth of submergence within the well liquid, said tubing carrying a valve and pump mechanism by which uid will be a1- ternately introduced into the two strings of pump tubing as the power pump mechanism recipro- .cates and will be controlled automatically by the power pump mechanism alone.

The invention is illustrated by way oi example in the accompanying drawings in which: n

Figure 1 is a view in section and elevationindieating the application of the present invention.

Fig. 2 is an enlarged fragmentary View in ceri- 4and I2, respectively, by pipes 20 and 2 I.

tral vertical section showing the automatic valve and pump unit atfthe bottom of the pump tubing.

Fig. 3 is an enlarged view in central longitudinal section showing the power pump mechanism.-

Fig. 4 is a view in transverse section through `5 the power pump mechanism as seen on the line 4-4 of Fig. 3.

y Fig. 5 is a view in transverse section through the valve and pump mechanism as seen on the line 5-5 of Fig. 2.

Referring more particularly to the drawings, I indicates af well bore within which a pair of strings o f well tubing II and I2 are placed. The upper end of these strings of tubing are connected with a power pump mechanism I 3, while the lower 15 ends 'o1' these strings of tubing connect with. a valve and pump unit I4. The power pump mechanism, as shown more particularly in Fig. 3. of the drawings, comprises a main cylinder I preferably disposed horizontally and being formed with fluid connections I6 'and I'I at its opposite ends. At a point intermediate the ends of the cylinder and in the upper wall thereof is an outlet passageway I8 provided with a'discharge connection I9. attached to any` suitable conduit by which the liquid from the pump may be conducted to storage or other apparatus. The fluid connections I 6 and II are in communication with pump tubing II Mounted within the cylinder I5 is a piston 22. This piston is of a length substantially less than the length of the cylinder in order to accommodate the stroke of the piston. Mounted upon opposite ends of the piston are packing cups 23 which g' form a tight fit with the wall of the bore of the cylinder I5 so that fluid will be displaced as the The discharge member I9. may be 25 tially tubular and 4it is formed adjacent its oppo- .v v

site ends with webs providing bearings 25 and 26. These bearings have aligned openings through them to receive a piston'rod 21. Mounted upon the piston rod beyond the webs25 and 26 of the piston are packing cups 28 and 29 which are secured in place in any suitable manner and form a tight sliding fit with the cylindrical cavities 30 and 3| occurring at the ends of the piston beyond the webs and in directcommunication with vthe interior of the cylinder I5. Formed v through the wall portion of the piston 22 within which the cavities occur there are ports. Those leading from the cavity 30 are indicated at 32, and those leading from ythe'cavity 3I areindicated .at .33.' These ports communicate with the cylinder within an annular space 33 which occurs between the wall of the cylinder bore' and the outer face of the piston wall. The space is closed'atdirected to the fact that the spacingof the packing cups 23 and 23 upon the piston rodf21 is such as to insure that there will be a sumcient amount of lost motion between the piston rod and the piston as will cause the ports 32 and 33 to be' alternately closed on alternate strokes of the piston rod 21, after which further movement of the piston rod in a given direction will make it possible for the piston 22 to be reciprocated within the cylinder I5. 1

I'he lower ends of the pump tubing II and I2 are in constant communication with the automatic valve and pump unit I4. This valve and pump unit comprises a pair of longitudinally aligned central'cyllnders 31 and 38 which are disposed vertically and are positioned between man.

ifolds 33 and 40 disposed in longitudinal alignment with the tubing strings II and I2, respectively, and in constant communication therewith. The cylinder 33 is lowermost and is tted at its lower opened end with a valve seat 4l carrying acheck valve 42. This valve is here shown as being disk shaped to close the fluid passageways 43 through the valve seat and is provided with a central stem, or pin, 44-aound which an expansion spring 45 is disposed, said spring acting to hold the valve on its seat and acting in opposition to the pressure of the fluid within the well exteriorl'y of the cylinder. A port 43 extends laterally through the wall of cylinder 33 adjacent the lower end thereof and communicates with the manifold 43 through a removable valve seat 41. A ball foot valve 43' normally rests on this seat acting by gravity-in the internal pressure of fluid within the manifold 43. The upper end of the cylinder 33 is provided with a lateral port 43 which leads outwardly from the cylinder and is in constant communication with the manifold 33. Mounted within the cylinder 33 is a recipro eating piston, or plunger, 33. which reciprocates within the cylinder 33 for a distance between the opposite end ports 43 and 43. This piston is carried upon a piston rod 3l which extends through a partition wall 32 by which cylinders 31 and 33 are separated. The upper end of the piston rod carries a piston 33. The opposite and upper end of the cylinder 31 from the. partition wall 32 is provided with a valve seat 34 having fluid passageways 33 therethrough which are closed by a valve disk 33 disposedwithin the cylinder and tending to prevent the flow of fluid therefrom. A valve pin 31 is attached to the disk and extends upwardly through the valve seat 34 and receives a` spring 33' which acts to hold the disk 33 in a closed position against pressure exerted exteriorly of the cylinder. It will, therefore, be seen that the valve disk 42 and the valve disk 33 when moved from their seats permit the inilow of fluid from the well bore, but prevent the outflow of fluid from the cylinders into the well. IJirect-- ly beneath the valve 33 and through the wall of ycylinder 31 is a port 33 which communicates with the passageway 33 leading to the manifold 33. A valve seat 33 is mounted within the lower end of this passageway and receives a valve ball 3| which normally rests upon the seat....by gravity.

and pressure from within the manifold 33, thus duplicating the foot valve structure 0f valve 10311 cylinder ports at' the opposite ends oi either cylinders. l

In operation of the present invention the power pump unit is asembled as generally indicated in Fig, 3, and the valve and pump unit is assembled as indicated in Fig. 2. These units are connected by suitable lengths of pump tubing II and I2 so as to suspend the valve and pump unit at a desired depth of submergence of the fluid to be elevated from the well. 'I'he entire structure is A then primed with liquid. 'I'he power pump may be connected to any driving mechanism, such, for example, as a motor33 provided with a pinion 33 in mesh with the gear 31 to which a pitman rod 33 is extended and which rod pivotally connects with the outer end of the piston rod 21. The piston rodis guided through suitable bearings 33 to maintain the piston in a linear path of movement. It will then be assumed that the piston is in the position shown in Fig. 43 of the drawings ready to be moved in the direction -of the arrow A. At this time it will be noted that the packing cup 23 has moved to a position to 'uncover the ports 32 Vof the piston and that the packing cup 23 has moved to cover the ports 33 of the piston. 'l'.'he end of the piston adjacent the connection I1 will thus be completely closed so that as the piston moves forwardly the pressure of the fluid within the tubing string I2 will then outwardly through ports 32 into the cylinderl I3, thereafter passing through the outlet port 33 into the members I3 and I3 to be discharged. At the time this is taking place the valve disk 33 will be seated to prevent fluid from within the cylinder 31: from being expelled into the well. At

lthe same time that the piston 33 is forced upwardly by the pressure of uid entering through port 32, the piston rod 3l will be lifted to elevate the piston 33 within the cylinder 33. This will cause anyiluid which is within the cylinderA 33 and above piston 33 to be forced outwardly into the manifold 33 to comingle with the iiuld forced outwardly into the manifold 33 from the connection 33, Ithus insuring that while sufficient fluid is forced into the cylinder 31 to lift the piston 33, that twice that amount of il'uid will be displaced 'in 'cylinders 31 and 33 and forced into the manifold 33 and the vtubing string II. While the pis\ ton 33 is moving upwardly. fluid pressure will be relieved from the valve disk 42 within the cylinder 33 and a suction action will take place, which, in combination with the force' produced by the hydrostatic head of fluid within the well.

.lifts the valve disk 42'.l allowing the cylinder 33 to ll with liquid. It is to lie understood that the piston displacement within cylinder I3 equals that required to move the piston rod 5I within the valve assembly within the length of its stroke.,.

When theV driving mechanism reverses the stroke of the piston rod 2l, the piston will stand Still in-` itially due to this inrush, and the piston rod 21 will shift in a counter-direction of the arrow A,

causing the packing cup 29 to uncover the ports 33 and the packing cup 28 to cover the ports 32. The reverse operation is then accomplished at which time fluid under pre`sure will pass downwardly through the tubing string llto the manifold 39 and will then of4 the piston 50 to pass against the upper face force the piston 50 and its piston rod 5I downwardly. The valve disk l2 will move to a closed position and the foot valve 48 will open so that the fiuid within-the cylinder 38 and beneath piston 50 will be forced into the It will thus be' seen that the'dvice here dis- A osed provides simple means having a few moving parts and whereby fluid may be elevated from a well at any depth and in the use of expensive mechanism.'

constant load without pump and counterbalanced While I have shown the preferred form of my.

invention as now known to me, it will'be'understood that various `changes may be made in combination, construction, and arrangement'of `parts by those skilled in the art without departing from the spirit of my invention as claimed. Having thus described my invention, what I claim and desire to secure by Letters Patent is: 1. In a pumping device of the character described, a pump cylinder having uid connections at the opened ends thereof, a pump discharge,

connection communicating with the cylinder through the wall thereof at a point intermediate the ends of the l cylinder forming a-uid tight t with the cylinder adjacent its opposite ends and forming an intermediate uid passageway between the intermediate portion of the piston and the cylinder, a piston within said opening and simultaneously closing the opposite openingin thepiston.

2. In a pumping device of the character described, a pumping cylinder having fluid connections at its opposite ends, a pump discharge means communicating with said cylinder, a piston adapted to reciprocate within said cylinder, valve means on said piston permitting discharge of the fiuid from the alternate ends of the cylinder' upon alternate strokes of saidpiston, and means automatically establishing communication between one of the fluid connections and `the discharge means as said piston moves within the cylinder and in a direction away from the uid connection withwhich said discharge means communicates.

-3. In a pumping device of the characterdescribed, a pump cylinder having uid connections atthe opposite ends thereof, a -pump discharge connection communicating with said cylinder at a point intermediate the ends thereof, a piston 'within said cylinder forming fluid tight iit therewith adjacent its opposite endsand forming an intermediate fluid passageway between the intermediate portion of the piston and the cylinder, said passageway being at all times in come munication with said discharge connection, said piston being yformed with passageway through it opposite ends so as to establish communication between the ends of the cylinder and the passa-geway therebetween, and valve means carried by said piston and alternately operating as piston reciprocates so as to alternately establish Y .communication between the end of the cylinder from which the piston' is moving to the discharge opening and simultaneously closing theopposite opening in the piston.

4. In an operating mechanism for a well pump, which pump has a pair of vertically' aligned cylinders, :duid conduits leading from said cylindersto `the top of the well, pistons disposed in" each cylinder moving in unison, a pair of alternately operating'valves for each cylinder, one acting to permit fluid to pass into the cylinder from kthe exterior thereof only, and l'the other permitting fluid to pass from the cylinder vto* one of said connections, the operating mechanism comprising a power pumping cylinder having uid connections at 'its opposite ends adapted to communicate with the well cylinders through said fluid conduits, a piston adapted to reciprocate in said cylinder, means permitting discharge of the uid from said cylinder 1upon alternate strokes of said piston, and means automatically establish` ing communication between one of the uid con-i' nections and discharge means as said pistons move within the cylinder and in a direction away from the uid connection with' whichvsaid discharge means communicates. y AUGUST WILL. 

